An active disturbance rejection passivity-based control strategy based on three level T-type neutral point clamped (TNPC) active power filte (APF) is proposed, which effectively solves the problem of poor control performance of traditional APF control strategy. The Euler Lagrange (EL) model of TNPC-APF is established. Based on the passivity of the system, a passivity-based controller of the current inner loop is designed by using the method of injection damping, which ensures the stability of the system in theory. Active disturbance rejection control (ADRC) is used in the outer voltage loop to effectively improve the control ability of DC side voltage, alleviate the problem of overshoot, make the system have good dynamic and static performance, and maintain the stability of DC side voltage. Simulation and experimental results verify the feasibility and superiority of the proposed control strategy.